spec-core

spec-core is a plugin for Claude Code from voro6yov/spec-driven-development. Its manifest loads nothing; the 3 skills, 2 agents it bundles cost 294 tokens per session together, scanned A, original, Apache-2.0.

A shared plugin that provides common rules, repository-inspection tools, naming conventions, and reusable code modules for specification-driven development.

In plain words
What is it for?
It supports tools that design and generate domain, application, persistence, REST API, and messaging layers.
Why use it?
It gives related development tools a common foundation instead of requiring each one to implement the same support functions.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit It supports tools that design and generate domain, application, persistence, REST API, and messaging layers.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add voro6yov/spec-driven-development
/plugin install spec-core
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/voro6yov/spec-driven-development

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for spec-core

README.md
[![agentmods](https://agentmods.dev/badge/plugins/voro6yov/spec-driven-development/spec-core/github.svg)](https://agentmods.dev/plugins/voro6yov/spec-driven-development/spec-core)
Your own site
<a href="https://agentmods.dev/plugins/voro6yov/spec-driven-development/spec-core"><img src="https://agentmods.dev/badge/plugins/voro6yov/spec-driven-development/spec-core/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for spec-core

Your own site · 80×15
<a href="https://agentmods.dev/plugins/voro6yov/spec-driven-development/spec-core"><img src="https://agentmods.dev/badge/plugins/voro6yov/spec-driven-development/spec-core.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 3 skills, 2 agents cost 294 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

spec-core scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/spec-core/.claude-plugin/plugin.json · 11 lines

What it actually says

{
  "name": "spec-core",
  "description": "Shared base conventions, agents, and reference modules for the spec-driven-development plugins (cross-plugin naming, layout, target-location resolution, and the copied runtime-contract modules)",
  "version": "0.9.1",
  "author": {
    "name": "Valentin Vorobyov",
    "email": "[email protected]",
    "url": "https://github.com/voro6yov"
  }
}
Contents

What it installs

The manifest is a name and a version. 3 skills, 2 agents travel with it, and installing the plugin installs all of them — 294 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 11 lines scan A 8c0a64a55e82

Subscribe to this mod's changes

spec-core is a plugin published in the GitHub repository voro6yov/spec-driven-development (5 stars, last pushed 13d ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-04.